"We've been seeing some families come in for years," says Twig's vice-president Ben Hartwig. "Cases get passed down and the next family member gets to bring them in.
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，这一点在搜狗输入法下载中也有详细论述
冬去春来，花开花谢，融合了历史与当下、发展和希望的蜡梅，在宜昌人心中常开不败。这朵小花及其承载的精神品格，一直伴随这座城市，在不懈奋斗中迎接更美好的未来。
What I found is that written evidence for knocking on wood (and for the history of gesture as a whole) is remarkably sparse. In the Penguin Guide to Superstitions, folklorist Steve Roud offers a skeptical take on the provenance of knocking on wood due to the near total absence of written records about it:
Мир Российская Премьер-лига|19-й тур